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m e h S m e e h S 4 S I V A D. 0m 0% M WT m Y w B0 M E0 H O J (No Model.)

Patented Feb. 3, 1885.

(No Model.) 4 Sheets-Sheet 2. J. CHERNEY & W. G. DAVIS.

ORE GONGENTRATOR. No. 311,863. Patented Feb. 3,1885.

(No Model.)

4 Sheets-Sheet 3 J. OHERNEY & W. C. DAVIS. ORE OONGENTRATOR.

No. 311,863. Patented Feb. 3

(No Model.) 4 Sheets-Sheet 4. J. CHERNEY {Sn W. OpDAVI'S.

ORE GONGENTRATOR. I

Patented Feb. 3, 1885.

Uiarrnn. rates Parent @rrres.

JACOB OHERNEY AND 'WILLIAM G. DAVIS, OF DENVER, COLO, ,ASSIGNORS TO SAID CHERNEY AND FRANCIS M. DAVIS, OF SAME PLACE.

ORE CONCENTRATOR.

SPECIPZCATEQN forming part of Letters Patent No. 311,863, dated February 3, 1885.

A pplic'atinn filed Septernl1eri,l88l. (No model.)

T (ZZZ whom it may concern.-

Be it known that we, JACOB OHERNEY and WILLIAM G. DAVIS, of Denver, in the county of Arapahoe and State of Colorado, have in- 5 vented a new and useful Improvement in Ore- Goncentrators; and we do hereby declare that the following is a full, clear, and exact description of thesaine,

Our invention relates to machines for con centrating ore; and the principal object of the invention is to produce a concentrating-ma chine adapted to treatall kinds of ores that may be found in any mining-camps, and to separate the ore from the gangue to the lib 1 most limit that can be obtained. Further, the object is to so construct the concentrator that the operator may have it fully under control, and be able to change the motion, as well as all the pans and their action, either while the machine is in action or at rest, and to adaptit to any kind of ore to be treated.

The best manner known to us of embodying our invention is illustrated in the accompanying drawings, in which Figure 1 represents a side elevation of the concentrator; Fig.

2, an end elevation. Fig. 3 is a top view of the concentrator. Fig. 4 represents a plan view of the finishing or lower pan. Fig. 5 shows a cross-section of Fig. 4 on line x.

0 In these drawings, A represents .a suitable frame, supported upon standards 1 2, adapted to oscillate in bearings 3 A at the base and 5 G in the frame. To this frame are firmly attached dressingpans B, B, and O. The pan 5 B rests directly upon the frame; the pan B is connected directly to a supplemental frame, A, which is supported by standards upon the frame A, and the pan (3 is connected directly to a frame, A suspended directly from the frame A. The pans B B are of the same con struction, and one description will suffice for both. The pansare made of sheet metal, preferably in one piece, having astraight and true bottom, with the edges turned up as flanges to form the sides, and with a low back end, this end being on thelefthand side, as represented in side elevation and plans. The front ends,

where the dressing is done, are narrowed off, as shown in the plan view. The side flanges of these. pans are provided at the required 0 points with rubber sections orjoints, (indicated in the figures by 1, I and 1 the joints being arranged in the same manner upon each side of the pan. These joints are made by cutting out a triangular piece from the side flange, the 5 point of the angle coming down to the bottom of the pan, and over this triangular space are fastened pieces of sheet india-rubber or any equivalent material of similar shape to the space, and slightlylarger, so as to overlap the edges and form joints. The joints are secured by riveting through the overlapping edges of the sheet-rubber and flanges, a light strip of metal being placed over the rubber for the support of the rivets at each joint. By this construction of the rubber joints the pan is capable of being elevated or depressed by sections divided from each other by said joints, while the pan is continually watertight and in working condition. The sections of the pan are raised and lowered by means of thumb-screws. (Shown in Fig. 1 at b, b and b Of these thumb-screws those marked b are held and made to turn in a light angleiron, 1. This angle-iron is riveted underneath to the bottom of the 'pans for the pur pose of stiffening. That underneath the pan B is shown in dotted lines in Fig. 3. The pans are stationary between the joints I and I; but the front ends may be raised by the screws b to the joint 1, and screws Z) to the joint 1*. The rear end may be raised to the joint I by the screws 1). The dressing end, therefore, which is on the right hand of the figures, is controlled independently ofthe rest ofthe pan. A water-pipe, F, (shown more plainlyin Fig. 3,) supplies water through the cooks b and dressing j etpipes t, 15*, and t", thesupply being regulated by the valves and cooks. The receiving-trough which receives the clean mineral 0 for final disposal is shown at b. At the rear of the pans (shown on the left-hand side of the drawings) is represented a skimming device in the form of V- shaped trough, G, the edge of which nearest the pan is bent so as to come in contact with and partly below the surface of the outflowing water, which water carries off the washed-out rock-sand over the slightly ther disposal, while the current,with the rest bent back or tail end of the table. On the surface ofthe said ouiflowing water the lightest ore is carried in suspension-such as sulphuret, chloride, tellurides, and other porous and spongy ores, the minute cavities or pores of which, being filled with air, prevent the ores from sinking to the bottom. These also are skimmedoff by the beveled edge of the trough. In Fig. 3 at H is shown what 'we call a wave-strip. This is hinged at one end to the side of the pan, and is held at any suitable angle by means of an arm, h, held in position bya pin inserted in any one of the series of holes in said arm. The strip is arranged and held so that the bottom edge thereof sinks a trifle below the surface of the-water, so that it does not interfere with the outgoing sand, but turns to one side the surface-current, and with it all the light mineral scum floating upon or near the surface. This scum byturning to one side can be more easily skimmed than if left distributed over the whole surface.

Underneath the skimming-trough-G is an inclined screen, D, the upper edge of which is secured underneath the pan, and the lower edge terminates in a- V- shaped trough, d, which trough is supported by an inclined plate E. These devices serve the following purpose: The screen Dseparates the largest grains of tailings from the current, which grains are supposed to be of the lightest rock, and therefore clean of mineral. These grains fall and are directed into trough d for furof the tailings, passes through the screens to the'inclined sheet 1G, and is carried to the center ofthe secondary or middle table, B, for further treatment with a smaller supply of water; or, all the tailings can be passed out of the upper pan into the next lower pan and receive treatment in said lower pan similar to that given in the upper, and from the second pan they may be passed to the third pan through the screen D and inclined plate E, the trough d catching the larger particles, precisely as in the similar construction described, between the pans B and B. The pan 0 differs entirely from the other pans heretofore described. It is of rhomboidal' shape in plan view, and the front end, 011 the right side of the figure,stands at an angle of about forty-five degrees to the stroke-line of the machine. On the upper surface of the bottom are attached strips 9, .g, and These strips may be about one-fourth of an inch high. Strips gand g extend to the front edge of the pan, but terminate in the rear beforereaching the rear edge. The strip g is parallel with the others, but extends from the rear edge of the back and terminates at a distance from the front edge. This compels all the stock to passupon the line across the slots 76. These slots are cut through the bottom of the pan, and provision is made for completely or partially closing them by means of suitable strips of india-rubber with suitable backing. (Shown by dotted lines in Fig.

4 at Z, Z, and Z These strips slide between the bottom and a suitable guard-strip, and they may he slid along so as to cover more or less of the bottom through which the slots are cut. Thus all the slots may be left open, or one may be closed wholly or the others partially covered, as shown in Fig. 4. The pan 0 is alsoprovided with a water-pipe, M, and cocks in, whereby a regulated flow of water may be delivered to the front end of the pan. It isalso provided with thumb-screws, as shown at it in Fig. 1, and in dotted lines in Fig. 4. The feed-cornerjs at N, Fig. 4, and at the opposite corner is shown a simple outlet-spout,0, through which the cleanly-washed sand is allowed to escape. All the water that co1nes,upon the pan 0 from the upper pans may be drawn. off at the back right-hand corner of the pan 0, in order to prevent too great a splash. At the left-hand end of Fig. l we have shown a device for working the pans, the same being shown also in Fig. 2. A pedestal,

'P, is provided with boxesp for 'the shafts which carry the eonepulleys R and the cam L. This cam works abell-crank lever, Q, and

through said lever gives horizontal motion to a bar, g, which connects the upper end of the bell-crank lever with ,the table A. Con-nection is made between this lever Q and the arm g by means of a'sliding block, 7, which is held upon a screw, 8, so that it may be raised orlowered, and by lengthening or shortening the vertical armof the bell-crank lever it lengthens or shortens the horizontal movement of-the table. The end of the horizontal arm of the bell-crank lever is connected by a link and pin to a piston rod, 0, which works through a gland and is connected to the piston-head in the cylinder S. This cylinder isprovided with inclined rows of aircocks 8, one row near the top and the other near the bottom. It is also provided with a check-valve in the bottom. (Not shown, but ofordinary construction.) The air-cocks may be opened or closed and allow a very great range of motion for the working of the pans to suit the kinds of ores. For example, by opening all the air-passages a rocking motion only is obtained with a percussion back-stroke, caused by the piston striking the bottom ofthe cylinder. By closing the air-exits more or less from the bottom of the cylinder any amount ofair-c'ushion may be obtained under the descending piston, and the backward motion therefore controlled. The upper row of holes allows the same method to be used for varying the amount of cushions for the forward stroke,- butas the forward stroke is more essential for good work the cam L is made an acceleratingcam-that is to say. it starts the bell-crank slowly at first, but increases the speed to the end or high part of the cam. The air-cocks having been first regulated, the air cushion formed between the piston-head and the top of the cylinder, with the aid of the weight of the piston,starts thetahle back with a jerk. The piston-head may be weighted, and may be cast hollow to receive weights of any suit-able kind, or a coiled spring, as

. shown at T, Fig. 2, may be interposed between the upper surface of the piston and theupper cylinder-head. Instead of this a hollow block of wood may be used as a piston, to give a stronger percussion movement for the working of the pans. By these means any intermediate motion between a percussion and a swinging motion may be produced.

The mode of operation of the apparatus is as follows: The pulp or stock is led from any suitable pulverizing-machine to the upper table, and is distributed about the center thereon by any suitable spreader. The motion of the machine is adjusted so that by a forward thrust everything is worked forward. including the gangue as well as the ores. If the incline of the pans were not sufficiently great to prevent it, everything would be jigged out over the front end of the pan; but this is pre vented without relying solely upon the inclination of the pans, by means of the jets of water let on by the pipes t, t and 25, the latter discharging only a very small amount. The water from these jets flows down the incline toward the left and carries the lightest material backward over the tail end and upon the screen D. In its passage it is skimmed, as heretofore described, and all that goes through the screen (if the screen is used) falls upon the incline sheetE and passes to the second pan, B. If the screen be not used, all the material passes to the second pan. This is where the same operation has to be performed as in the top pan; but the water and inclines may be varied in amount and different results ob tained. For example, the apparatus may be used as a second-grade concentrator, or where the heaviest mineral is of the lowest grades as iron pyrites-with lighter and higher ore, as ruby tellurium. Then the second table will produce the most valuable concentrates, the first pan having enough water to wash everything over to the second pan, excepting pyrites, the apparatus being changed for this purpose at the will of the operator. After this second washing the material still goes on to the third pan, 0, where the finishing is thoroughly effected. The ore passes in this pan in the direction indicated by the arrow in Fig. 4:. -The stock, now moving as tailings, is agitated in almost still water, as a fresh supply inthis operation is added in the pan 0 only in drops. The pan along the washing-edge being elevated only slightly in a long distance, all the remaining ore that is not kept back by the bars g g and forced along them over the end or edge is driven by the bar 9 along the line across the slots in the pan. The heaviest particles hug the pan the most. The water carrying the lighter sand slowly retreats down the incline away from the slots, and leaves a chance even for material of laminous structure (like black-jack,

tom occasionally to do with the present sys tem in use. The steam from the outlet corner of the pan 0 shows distinctly,by spreading the ore out and by moving at an angle,what is in the tailings, if anything at all. Thisis done by the apparatus especially well when the coarser grains of the tailings have been thrown out by the screen, leaving only the finest, and for this purpose and in this way the table is mostly intended to be used.

We do not limit ourselves to the number of pans shown, and may use either more or less of the upper pans in combination with the lower.

\Ve claim as ourinvention 1. In an ore-concentrator, pans having flGXh ble joints, and means for raising or lowering the sections between the joints, substantially as described.

2. The combination, with the sheet-metal pan of a concentrator, formed with flanges and V-shaped cuts therein, of flexible sheets, substantially as described.

3. In combination with a pan of a concentrator, a surface-water skimmer, G, and a wavestrip, H, substantially as described.

4. In a concentrator substantially as described, thelower pan, 0, ofrhomboidal shape, having its feed end in one angle and dischargepipe in opposite angle, substantially as described.

5. In combination with the pan G, having too means for directing the current, and the slots 7c, the valves for closing said slots, substantially as described.

6. In combination with the pan C, having slots and valves, bars 9, g, and g.

7. In combination with the pans, the bellcrank lever, and connection between said lever and pans, an accelerating-cam, substantially as described.

8. In combination with the bell-crank lever, the cam, and the pan connected to said lever, the air-cylinder provided with vents, adapted to form air-cushions, substantially as described. 7

9. In combination with the cylinder and its piston, the pan, the bell-crank lever connected to the pan, the driving-shaft and its cam, and the pedestal, all substantially as described.

10. In combination, the frame A, mounted upon the rocking standards 1 2, the supmental frames A A", supported by the said frame A, and means for oscillating the same, substantially as described.

11. The vertically-flexible pan B, having water-supply pipes at its front end and an inclined screen connected to its rear end, combined with the painfB, and a pan, 0, and suitable supporting-frames, all substantially as In testimony whereof we have signed Olll 10 names to this specification'in the presence of described. i two subscribing witnesses. 12. In comblnation wlththe pan 0, of rhom- JACOB GHERNEY ends, with slots is, and means for directing the current, an upper pannnade flexible in substantially-the manner described and connected to the pan 0, as set forth.

In presence 0t' WM. SCOTT LEE,

5 boidal shape, made with feed anddischarge i 4 WILLIAM C DAVIS. 4

l W. S. CURTIOE. 

